Hanger bolt for boiler settings



March 29 1927.

lR. H..w\f|.D`ra1-Al..l HANGER BOLT Foa BOILER SETTINGS Filed Ma/15,'192s '35 posed lFoster superheater elements 'Patented Mar. 29, 1927.' l

UNi'TED STATES PATENT oFF-ica.

Ronan H. WYLD, or HnnPsTnAn; .AND WALTER F. XEENAN; Jn., or PELHAM, NEW

Yonx, AssIGNoas To rev/En SPECIALTY 'conramn oF NEW Yonx, N. Y., A con-POBATION OF NEW YORK.

i HANGER ynoni: Fon. BOILER SETTINGS;

application led May l5, 1923. Serial No. 639,056.

'lhe object ofour invention is to rovide hanger bolts adapted for use inboller settings with simple and effective air cooling provisions.

The various features of novelty which characterize our invention arepointed out with and orming a part of this specification. For a betterunderstanding of the invention tive matter in which we have illustrateda preferred embodiment of our inventionand one of the many uses'to whichit may be put. 0f the drawings: l

Fig. 1 is a partial secti Ynal elevation of a portion of a boiler' furne ;.A

Fig. 2 is a artial section 'on the line 2-2 'ofF1g. 1; and) v Fig. 3 isa section taken similar to Fig. 1 but on a larger scale and showinga-portxon ony of the apparatus shown in Fig. 1.

n the drawings A is a conventionally illustrated vertical tube boilermounted in a housing comprising a combustion chamber A' in front of theboiler, with an arch B' above the combustion chamber and extendinginward from vthe 4portion B of the boiler housin wall above the 'arch B.

wall B ofthe -boiler housing is located a superheater which as shownlcomprises a vertical row` of pairs of horizontally diselementsconsisting of bare steel tubes cncased in tubuar externally corrugatedcast iron sections. The superheater elements C :are supportedbysuspensionor hanger bolts 'y E which extend through the roof portionB2 of the boiler housing; and are provided at their upper nds with nutsbearing against the-'top edges of spaced apart channel bar beams D, andare connected at their lower ends, each to `a`, corresponding abutmentmember F on which rest the. lower pair of elements C f each verticalrow-"fofsuch elements. Tile elements C above the bottom pair. are-spacedapart by 4met-al' spacino' elefinents G, and each hanger bolt thusesr'ries I a portion ofthe weight of all of the pairs of elements Cbetween which-'it passes.- In so far as above described,y theapparatusarticularity 'rh the claims annexed toshown contains nothing now lnovelwith us, but on the contrary, is a typical instance of one'of the manyuses of hanger bolts inat its upperside and 'with an outlet Fa adja- 10and its advantages, reference should be had to the accompanying drawingsand descrip-- cent the boiler housing wall portion B. Each hanger bolt EpassesV through but does .not fill the air chamber F and outlet F2.

.Surrounding each hanger bolt B is a tubular space between the bolt andits surrounding sleeve is open to the externahatmosphere at the upperendof the sleeve and is` open to the air chamber F in the abutmentmember at its lower end. The sleeve is suitably seated on the member F.'As shown the parts are threaded together but this is not essential.` "Apipe I, shown as threaded into the lateral port F, projects through theboiler housing front wall B, and has its so In t e space .above the archB and between `the boiler water tubes and the front outer end open tothe atmosphere. As shown in Fig. 2, one of the hanger bolts E and `itsenclosingsleeve `H are incorporatedin the end wall Bs of the boilerhousing. whie the sleeve H'about the other hanger bolt shown 1. e.'

isin contact with the heating gases flowing through the boiler setting.Whether incorporated in the housing wall inwhole or in part, the sleeveH absorbs, heat more or less rapidly and correspondmgly Iheats thearinthe annular channel g between the sleeve and the hangerbolt which itsurrounds. In consequence,I the channel `acts like a chimney to createadraft drawing cold air into the lower end of the channel through thepipe I and air chamber F. and discharging hot airinto the atmosphere atthe upper end of the channel. fThe air thus caused .to Iflow through thechannel lwithin the sleeve H prevents .the'hanger bolt from being'heated to van' undesirably high lim.

temperatureand also protects the sleeve against overheating: even thoughthe temperature in the space traversed byfthe sleeve H may besubstantially about that at which uncooled metal parts would be weakenedor destroyedf hose skilled in the art will understand that the inventionis not limited to the use illustrated but is capable of general use withhanger bolts employed in boiler` settings of various boiler andsuperheater parts. Those skilled in the art will understand, also, thatmany modifications in form mav be made,

Without departing from the spirit of my invention as set forth in theappended claims.`

Hariri,"lr now described our invention, what we claim as new and. desireto lsecure by Letters Patent, is:

l. In a boiler setting comprising a hanger bolt located in a hightemperature portionof the setting, the improvement which consists in .asleeve surrounding the bolt with an air lspace between the bolt and thesleeve Which-1s in communication at its upper and lower ends with theatmosphere, whereby the. bolt is Icooled by air drawnthrough said airspace by the chimney action of the latter.

2. In a boiler setting the combination with a'part to be supporteh, ofsupporting means abutment member engaged by said part and secured tosaid bolt and formed with an air t atmosphere.

'therefor comprising a hanger bolt-and an Signed atNew York. in thecounty of l New York and State of New York, this 8th:

day'of May A. D. 1923.

ROBERT H. WYLD. WALTER F. KEENAN, JR.

